A Russian emerald and diamond choker, by Bulgari. Estimate CHF75,000 – CHF115,000 ($75,639 - $115,980). Photo Christie's Image Ltd 2015

The gold fancy-link necklace set to the front with five graduated emerald oblong beads, each enhanced by square-cut diamond circlets, 40.0 cm, mounted in gold. With maker's mark for Bvlgari 

Accompanied by report no. 82350 dated 29 September 2015 from the SSEF Swiss Gemmological Institute stating that the origin of the emeralds is Russia, with indications of moderate to significant amount of oil.
Report no. 15100003 dated 5 October 2015 from the Gübelin GemLab stating that the origin of the emeralds is Russia, with indications of moderate clarity enhancement. 

Christie's. GENEVA MAGNIFICENT JEWELS, 10 November 2015, Geneva